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    <title>Document</title>

    <link rel="stylesheet" href="./效果2.css">
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    <div class="card-list">
        <div class="card-item first">1</div>
        <div class="card-item second">2</div>
        <div class="card-item third">3</div>
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    <div id="d0">
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        <div id="d2">
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